text: 'use strict';
  
  var gulp = require('gulp');
  var browserSync = require('browser-sync');
  
  function isOnlyChange(event) {
    return event.type === 'changed';
  }
  
  module.exports = function(options) {
    gulp.task('watch', ['inject'], function () {
  
      gulp.watch([options.src + '/*.html', 'bower.json'], ['inject']);
  
      gulp.watch([
        options.src + '/app/**/*.css',
        options.src + '/app/**/*.scss',
        options.src + '/sass/**/*.css',
        options.src + '/sass/**/*.scss'
      ], function(event) {
        if(isOnlyChange(event)) {
          gulp.start('styles');
        } else {
          gulp.start('inject');
        }
      });
  
      gulp.watch(options.src + '/app/**/*.js', function(event) {
        if(isOnlyChange(event)) {
          gulp.start('scripts');
        } else {
          gulp.start('inject');
        }
      });
  
      gulp.watch(options.src + '/app/**/*.html', function(event) {
        browserSync.reload(event.path);
      });
    });
  };
  